Miniature rose plant named ‘KORpot019’

ABSTRACT

A new and distinct variety of rose with long lasting, novel yellow flowers, and attractive foliage with very good disease resistance. It exhibits upright to bushy growth with abundant flowers. The new variety propagates well from cuttings and by grafting. This new and distinct variety has shown to be uniform and stable in the resulting generations from asexual propagation.

Latin name of genus and species: The botanical classification of the new rose plant is Rosa hybrida.

Variety denomination: The denomination of the new variety is ‘KORpot019’.

CROSS REFERENCES AND FEDERAL R&D STATEMENT

There are no cross referenced or related applications. This variety was developed without the aid of any research grant.

The new variety of rose plant of the present invention originated from a controlled crossing in a breeding program of two distinct parents during the summer of 2008. The crossing was between an ‘un-named seedling’, the seed parent, and another ‘un-named seedling’, the pollen parent, from the same inventor.

The resulting seeds were planted during the following winter. The resulting seedlings were evaluated and exhibited distinctive physical and biological characteristics. The new rose plant was selected as a single plant from the seedling beds due to its superior characteristics and asexually propagated for further evaluation. This new and distinctive rose variety is named ‘KORpot019’.

SUMMARY OF THE INVENTION

The new rose plant may be distinguished from its seed parent, an ‘un-named seedling’, by the following combination of characteristics:

-   -   1. ‘KORpot019’ has double yellow flowers whereas the seed parent         has very double yellow flowers with pink edges.     -   2. ‘KORpot019’ has a compact habit, whereas the seed parent has         a tall habit.

The new rose plant may be distinguished from its pollen parent, an ‘un-named seedling’, by the following combination of characteristics:

-   -   1. ‘KORpot019’ has medium sized double flowers, whereas the         pollen parent has small semi-double flowers.     -   2. ‘KORpot019’ has above average disease resistance, whereas the         pollen parent has average disease resistance.

The objective of the hybridization was to create a new and distinct rose plant with unique qualities, such as:

-   -   1. Uniform growth and flowering;     -   2. Abundant attractive, recurrent flowers;     -   3. Attractive and abundant foliage; and     -   3. Resistance to diseases encountered in landscapes and gardens.

This combination of qualities is not present in prior rose cultivars known to the inventor. These objectives have been substantially achieved and in that distinguish ‘KORpot019’ from all other varieties of which I am aware.

As part of a rose development program, Tim-Hermann Kordes germinated seeds from the aforementioned hybridization and conducted evaluations and observations on the resulting seedlings in a controlled environment in Offenseth-Sparrieshoop, Germany. The resulting seedlings exhibited distinctive physical and biological characteristics. The new rose plant ‘KORpot019’ was selected in May, 2009 from the seedling beds to be asexually propagated for further evaluation. The first asexual propagation of ‘KORpot019’ was done by rooting cuttings in June, 2009 at the inventor's nursery in Offenseth-Sparrieshoop, Germany.

This initial and other subsequent propagations conducted in controlled environments demonstrate that ‘KORpot019’ reproduces true to type in successive generations of asexual reproduction.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying color drawing shows as true as is reasonably possible to obtain in color photographs of this type, the typical characteristics of the buds, sepals, reproductive organs, flowers, petals, leaves, prickles, and stems of ‘KORpot019’.

DETAILED BOTANICAL DESCRIPTION

The following is a description of ‘KORpot019’, as observed growing in January, 2012 in a nursery in Jackson County, Oreg., on plants 10 months of age. Color references are made using The Royal Horticultural Society (London, England) Colour Chart, 2001 except where common terms of color are used.

For a comparison, several physical characteristics of the rose variety ‘KORspunty’, a rose variety from the same inventor described and illustrated in U.S. Plant Pat. No. 17,402 and issued on Feb. 6, 2007 are compared to ‘KORpot019’ in Chart 1.

CHART 1 Characteristic ‘KORpot019’ ‘KORspunty’ General tonality Yellow-Orange Group 16B Yellow Group 9B Petal count 35-40 50-60 Pistil count Approximately 25 35-45

-   Parents:     -   -   Seed parent.—‘Un-named seedling’.         -   Pollen parent.—‘Un-named seedling’. -   Classification:     -   -   Botanical classification.—Rosa hybrida ‘KORpot019’.         -   Commercial classification.—Miniature rose.

FLOWER AND FLOWER BUD

-   -   -   Blooming habit.—Recurrent.         -   Flower bud.—Size: Upon opening, 35 mm in length from base of             receptacle to distal end of bud and 23 mm diameter at its             widest point. Bud form: Long. Pointed ovoid. Bud color: As             sepals first unfold, bud color is Yellow-Orange Group 22A             and Yellow-Orange Group 22B. When ¼ open, the upper surface             of petals is Yellow-Orange Group 14A, and the lower surface             is Yellow Group 13B. Guard Petals are Yellow-Orange Group             19A and Yellow-Orange Group 19B, with a basal zone of             Yellow-Green Group 146C and red intonation of Greyed-Red             Group 180A. Sepals: Color: Upper surface Yellow-Green Group             146D. Lower surface Yellow-Green Group 146A. Size: Average             26 mm (l)×6 mm (w). Shape: Very weak foliaceous appendages             on 0 to 2 of the 5 sepals. Apex: Apiculate. Base: Flat at             union with receptacle. Quantity: Five. Surface texture:             Upper side: Pubescent. Lower surface: Smooth with numerous             stipitate glands. Margins: Pubescent with limited stipitate             glands.         -   Receptacle.—Surface: Smooth with a few stipitate glands near             top. Color: Yellow-Green Group 146C with intonations of             Greyed-Orange Group 175A. Shape: Urn-shaped. Size: 9 mm             (h)×9 mm (w).         -   Peduncle.—Surface: With fine hairs. Length: 60 to 65 mm             average length. Diameter: 3 to 4 mm average diameter. Color:             Yellow-Green Group N146C and Yellow-Green Group N144A with             intonations of Greyed-Red Group 178B. Strength: Strong.             Borne: Singularly.

-   Flower bloom:     -   -   Fragrance.—Light-moderate.         -   Duration.—On the plant 10 to 12 days. Long lasting. Senesced             petals drop away cleanly.         -   Size.—Large for a miniature rose. When open, the average             flower diameter is 50 mm and the average flower height is 35             mm.         -   Form.—Shape of flower when viewed from the side: Upon             opening, upper part: Flat. Upon opening, lower part:             Flattened convex. Open flower, upper part: Flattened to             flattened convex. Open flower, lower part: Flattened convex.

-   Color:     -   -   Upon opening, petals.—Outermost petals: Outer Side:             Yellow-Orange Group 14C, with Yellow-Orange Group 14B at             margins. Inner Side: Yellow-Orange Group 14A. Innermost             petals: Outer Side: Yellow-Orange Group 14C. Inner Side:             Yellow Group 12A.         -   Upon opening, basal petal spots.—Basal petal spot, outermost             petals: Outer Side: Green-Yellow Group 1A. Inner Side: None             observed. Basal petal spot, innermost petals: Outer Side:             None observed. Inner Side: None observed.         -   After opening, petals.—Outermost petals: Outer Side:             Yellow-Orange Group 18A. Inner Side: Yellow-Orange Group             15C. Innermost petals: Outer Side: Yellow-Orange Group 21C.             Inner Side: Yellow-Orange Group 15B.         -   After opening, basal petal spots.—Basal petal spot,             outermost petals: Outer Side: Green-Yellow Group 1C. Inner             Side: None observed. Basal petal spot, innermost petals:             Outer Side: None observed. Inner Side None observed.

-   General tonality: On open flower Yellow-Orange Group 16B. No change     in the general tonality at the end of the seventh day. Afterwards,     general tonality is Yellow-Orange Group 16D.

-   Petals:     -   -   Petal count.—Double.         -   Average range.—Approximately 35 to 40 petals under normal             conditions.         -   Petal reflex.—Petals reflex slightly.         -   Petal edge.—Entire with a point in the center.         -   Petal shape.—Obovate. Apex shape is round. Shape of base is             obtuse.         -   Petal size.—30-35 mm (l) 25-30 mm (w).         -   Thickness.—Thick.         -   Petal arrangement.—Not formal.

-   Petaloids:     -   -   Petaloid count.—Average of 6 to 10 per flower.         -   Petaloid size.—Petaloids are 15-25 mm (l) and 8-12 mm (w).         -   Petaloid color.—Color of inner side is Yellow Group 13D.             Color of outer side is Yellow-Orange Group 16B.         -   Petaloid texture.—Thick.         -   Margins.—Irregular.         -   Petaloid shape.—Most commonly deltoid, with some petaloids             highly irregular. Apex: Oblanceolate. Base: Attenuate.

-   Reproductive organs:     -   -   Pistils.—Abundant. Approximately 25 present. Stigmas:             Location: Slightly inferior in position to anthers. Color:             Yellow-Green Group 150C. Styles: Length: About 5 mm long.             Color: Green-Yellow Group 160A.         -   Stamens.—Approximately 60 on average and regularly arranged.             Anthers: Size: Average 2-3 mm (l). Pollen: Generally present             in limited amounts. Color: Greyed-Orange Group 165B.             Filaments: Color: Yellow-Orange Group 17C. Length: 4-6 mm.

THE PLANT

-   -   -   Growth.—Moderate.         -   Plant habit.—Upright to bushy habit. When grown as a 10 cm             pot plant, the average plant height is 25-30 cm and the             average plant width is 12-15 cm.         -   Blooming.—Floriferous.         -   Stems.—Stem color: Young wood: Yellow-Green Group 146A.             Older wood: Green Group 137C. Stem surface: Young wood:             Smooth. Older wood: Smooth.         -   Prickles.—Present. Incidence: Average of 8 per each 10 cm of             stem. Size: Average length: 3-4 mm. Color: Immature             prickles: Greyed-Purple Group 185B. Mature prickles:             Greyed-Orange Group 166C. Shape: Linear to concave.         -   Leaves and leaflets.—Normally 5 leaflets on normal leaves in             middle of the stem. Venation pattern: Pyramidal net pattern.             Leaf size: 90-100 mm (l)×40-55 mm (w). Abundance: Average.             Texture: Leathery. Upper side of leaflet: Semi-glossy,             smooth. Under side of leaflet: Matte, smooth. Color, mature             foliage: Upper Leaf Surface: Green Group 137A. Lower Leaf             Surface: Green Group 137C. Color, juvenile foliage: Upper             Leaf Surface: Green Group 137B. Lower Leaf Surface: Green             Group 137C. Anthocyanin intonation: Present. Intonations of             Greyed-Purple Group 187B present on leaflet edges and lower             side.         -   Stipules.—Size: 5 mm long, 3 mm from distal tip to distal             tip. Stipule color: Green Group 137B. Margins: With             stipitate glands. Shape: Apex: Apiculate. Base: Slightly             winged.         -   Petiole.—Length: Average 12-15 mm. Diameter: Average 1.5 mm.             Petiole color: Green Group Green-Yellow Group 144A.             Underneath: Smooth with occasional prickles. Margins: With             stipitate glands. Anthocyanin: Greyed-Purple Group 183B             found on margins. Prickles: Occasional.         -   Petiole rachis.—Length: Average 18-20 mm. Diameter: Average             1 mm. Color: Yellow-Green Group 144B. Margins: With             occasional stipitate glands.         -   Leaflets.—Size: Average size of the terminal leaflet is             35-40 mm (l)×20-25 mm (w). Shape: Ovate. Base: Obtuse. Apex:             Murconate. Margins: Serrated. Surface: Upper: Moderately             glossy. Lower: Matte. Texture: Thin. Arrangement: Odd             pinnate Venation Reticulate.

-   Hips/seed formation: Not observed.

-   Winter hardiness: Unknown

-   Disease resistance: Very good average resistance to Powdery mildew     (Sphaerotheca pannosa), and Botrytis (Botrytis cinerea) diseases     under normal growing conditions. 

I claim:
 1. A new and distinct variety of rose plant, as described and illustrated herein. 